On Shift : Peter Maas, Mara Martini + Rob McTaggart (17:45 - 18:30) + Flavio Marchetto (20:00 - 22:00) Run plan : Continue taking data several MeV above the center of the Chi2 1) We are informed that there is a noisy octant in the CCAL ... after some investigation, discover that 16 blocks in Wedge 57 are at 1680 Volts. Decide to replace HV card and recommence the data taking at this point. After some missteps, with the aid of Rob McTaggart, succeed in solving the problem. In essence, channel 12 went sour at 11 am. At that point all 16 channels went to 1680 Volts. At 18:30, recommence taking data. [During the lull, we insert a new file for the Phi MLU and Gabriele changes the Hydrogen bottle.] At the start of the run, we adjust the gas jet density to bring the luminosity to 1.7 x 10^31 cm-2 sec-1. After we reach this point, we turn the automatic regulation on. Luminosity remains constant through midnight. People are reminded to record the gas jet status once an hour in the gas jet logbook. [At 18:45, someone backs his car into Peter's car. People are warned to be careful when backing up in the parking lot next to the trailers.] 2) Data acquisition system hangs at 21:00. It appears to be due to too many processes on fn835x. Perform a fresh start. DAQ resumes at 21:10. 3) Data acquisition system hangs at 21:30 due to a DYC synchronization problem. Program automatically halts and all tape drives are sent into an IDLE state. Reinitialize DAQ, remount tapes, and restart DAQ. Run Total Integrated Luminosity 750 150 inverse nanobarns 752 30 753 [150] Run will continue into the next shift *************************************************************************** Total accumulated as of midnight, Sunday at the Chi2 : 330 nb-1 Anticipated Time for Energy Change : 0:00+670nb-1 / 60nb-1 / hour = 11:00 Beam Momentum : 5728.524 MeV/c Beam Lifetime : 80 Hours Momentum Spread : 1.3 MeV/c *************************************************************************** Peter Maas (for the evening shift)